The Atmospheric 222Rn database
EML's 222Rn analyzers, deployed at the Mauna Loa Observatory (MLO; operated under the auspices of the NOAA/ Climate Monitoring and Diagnostics Laboratory) and at Bermuda (at the Atmospheric/Ocean Chemistry Experiment Site at Tudor Hill, Bermuda), provide data used to determine air mass provenance, specifically, the timing of continentally-derived air transported to the mid-Atlantic and mid-Pacific. Additionally, the 222Rn data are used to better understand local meteorological effects, as well as providing the scientific community a rare database used to validate global transport models.
The databases can be viewed online if your browser supports tables, and can be downloaded in MS Excel 5.0 format or Adobe Acrobat PDF format. Each file contains one years data for one site. Concentrations are in mBq m-3, with times listed being the beginning of the sampling period. For the MLO site, data are analyzed on a half-hour period, whereas at the Bermuda site data are analyzed on an hourly basis.
For more information on the specifications and use of EML's 222Rn analyzer, see Hutter et al. (1995).
The results of the first international intercomparison of atmospheric 222Rn analyzers, including EML's analyzer, was published in the Journal of Geophysical Research (Collé et al.).
MS Excel 5.0 spreadsheets (in ZIP files):
Tables and PDF files:If you do not have Adobe Acrobat Reader, click here to download it.
Collé, R., M. P. Unterweger, P. A. Hodge, J. M. R. Hutchinson, S. Whittlestone, G. Polian, B. Ardouin, J. G. Kay, J. P. Friend, B. W. Blomquist, W. Nadler, T. T. Dang, R. J. Larsen and A. R. Hutter. "An international intercomparison of marine atmospheric Rn 222 measurements in Bermuda". Journal of Geophysical Research, 100(D8):16617-16638, 1995.
Hutter, A. R., R. J. Larsen, H. Maring, J. T. Merrill. "222Rn at Bermuda and Mauna Loa: Local and Distant Sources". Journal of Radioanal. and Nuclear Chemistry, 193(2):309-318, 1995.
For more information about the Atmospheric 222Rn database, contact:NUSTL.firstname.lastname@example.org